Cost Factors:Contractor's costs were specified in terms of a ceiling of $1,763,000
Of this total, approximately $800,000 were for activities directly attributed to treatment
The unit cost for activities directly attributed to treatment was $267/yd3

Description:The Parsons site is a former agricultural chemicals mixing, manufacturing, and packaging facility. Soils and sediments at the Parsons site were contaminated with pesticides, heavy metals, and dioxins. ISV treatment of approximately 3,000 yd3 of contaminated soils and sediments at the Parsons site, consisting of eight melts, was performed from May 1993 to May 1994. This was notable for being the first full-scale application of ISV treatment at a Superfund site.

Confirmation coring sampling could not be performed until after the ISV melt had cooled, approximately one year after treatment was completed. Three corings, or drill holes, were performed in locations selected to represent the ares with potential residual contamination. The confirmation coring sampling results indicated that the vitrified material in all three drill holes had mercury and pesticide concentrations below detection limits, and therefore that the vitrified material met the cleanup goals for this application. Also, analytical data for volatiles and semivolatiles in the containment soil beneath the three drill holes were reported as below detection limits, indicating that volatiles and semivolatiles were not present in the soil beneath the vitrified material.

This application demonstrated that final sampling of vitrified material needs to allow adequate time for the melt to cool (e.g., one year). In addition, the vendor identified several operational issues (e.g., decomposition of particle board forms, irregular melt shapes) during treatment of the first few cells at Parsons. The cleanup contractor's cost ceiling for the ISV treatment application at Parsons was $1,763,000, including $800,000 for vitrification, which corresponds to $267 per cubic yard of soil treated.